Total entries: 323893 Books: 11024 Journal Articles: 258211 Proceedings Articles: 54658
| Year(s) | Total | Books & | Journal | Proceedings/ | |
| Entries | Proceedings | Articles | Edited book | ||
| Volumes | Articles | ||||
| Up to 1974 | 15974 | 57 | 15025 | 892 | |
| 1975 - 1980 | 33772 | 2036 | 25290 | 6446 | |
| 1981 - 1990 | 80654 | 4517 | 58548 | 17589 | |
| 1991 - 2000 | 99153 | 3776 | 77413 | 17964 | |
| 2001 - 2005 | 48821 | 572 | 40760 | 7489 | |
| 2006 | 9467 | 11 | 7858 | 1598 | |
| 2007 | 7958 | 10 | 7194 | 754 | |
| 2008 | 8706 | 23 | 7740 | 943 | |
| 2009 | 8279 | 7 | 7608 | 664 | |
| 2010 | 7063 | 14 | 6730 | 319 | |
| 2011 | 4046 | 1 | 4045 | 0 |
Journals indexed: 2144
